50 Operational Reference Genie Monochrome Series-GigE Vision CameraSynchronization TimingGenie supports two types of sensor synchronization used to align the exposure to sensor timing: Synchronous Mode: Exposure is synchronous to the line timing of the sensor. Exposure granularity is 1μs andthe readout can be concurrent to the exposure for the fastest possible frame rate. Reset Mode: Timing is reset to initiate exposure of next frame. Exposure granularity is 1μs, but readout mustbe sequential to exposure, reducing the maximum achievable frame rate.Synchronous Mode Synchronous mode starts the exposure period aligned to the sensor horizontal line timing and the programmableduration granularity is 1μs. In the case of the Genie M640, a horizontal line occurs every 31.77μs. Exposure duration is from the sensor minimum (see Genie Sensor Overview) up to 16 sec. In this mode, sensor exposure and sensor readout of the previous frame's exposure occur simultaneously. Thisallows operating the sensor up to its maximum frame rate. Any trigger received before the end of the exposure is ignored. The application can elect to receive messagesabout ignored triggers. See "Events" on page 69. Since the external trigger is asynchronous with the Genie horizontal line timing, the frame exposure start issubject to 1 horizontal line jitter.Synchronous Mode Timing example for Genie M640
